Double-folded self-locking stop washer

Abstract

The utility model belongs to the technical field of railway contact networks, and particularly relates to a double-folded self-locking lock washer which comprises an upper gasket, a lower gasket and a locking baffle plate which is formed by extending outwards from the lower gasket and used for axially limiting a nut, the surfaces, close to each other, of the upper gasket and the lower gasket are oblique tooth surfaces, the surfaces, far away from each other, of the upper gasket and the lower gasket are convex grain surfaces, and the upper gasket and the lower gasket are integrally formed. The two oblique tooth faces are meshed with each other, the stop baffle is bent towards the upper gasket to form a pre-bend, a bent section is formed at the connecting position of the stop baffle and the lower gasket, and a through hole is formed in the bent section. According to the double-layer gasket, the double-folding self-locking function and the locking function are integrated on the same double-layer gasket, physical locking is achieved while the physical self-locking function is achieved, the phenomenon that the bottom of the lower gasket deforms due to the fact that the flange is bent on site can be reduced due to the fact that the locking baffle is pre-bent, and in addition, the bending difficulty can be reduced due to the fact that the through hole is reserved in the bending section.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway contact network, and in particular relates to a double-stacked self-locking stop washer. Background Art

[0002] In the railway transportation system, many components are connected and fixed with bolts and nuts. However, due to the frequent vibration of the railway contact network, the bolts and nuts often become loose, causing the nuts to fall off, thereby causing contact network failure, posing a great safety hazard to the railway transportation system. Therefore, double-stacked self-locking washers or stop washers, which are commonly used anti-loosening washers for contact network components, are usually used to prevent bolts and nuts from loosening. However, double-stacked self-locking washers and stop washers are generally used alone or in combination, and there is a phenomenon of poor anti-loosening effect or redundant parts. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the problem that the contact network system in the prior art usually adopts double-stacked self-locking washers or stop washers and other anti-loosening washers commonly used in contact network components to prevent loosening, but the two are generally used alone or in combination, and there are problems such as poor anti-loosening effect or redundant parts. A double-stacked self-locking stop washer is now provided.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a double-stacked self-locking stop washer, comprising an upper gasket, a lower gasket and a stop baffle extending outward from the lower gasket to axially limit the nut, the upper gasket and the lower gasket have a beveled tooth surface on the sides close to each other, and a convex surface on the sides away from each other, the two beveled tooth surfaces mesh with each other, and the unevenness of the convex surface is greater than the unevenness of the beveled tooth surface, so that the friction between the convex surface and the base or the nut is greater than the friction between the two beveled tooth surfaces, the stop baffle is bent in the direction of the upper gasket to form a pre-bend, which can reduce the deformation of the bottom of the lower gasket due to the bending flange on site, so as to improve its locking force; the connection part between the stop baffle and the lower gasket forms a bending section and the bending section is provided with a through hole, which can reduce the difficulty of bending.

[0005] The above technical solution integrates the double-stack self-locking function and the stopping function into the same double-layer gasket, realizing the physical self-locking function while realizing the physical stopping. The pre-bending of the stop baffle can reduce the deformation of the bottom of the lower gasket caused by the bending flange on site. In addition, a through hole is reserved in the bending section to reduce the difficulty of bending.

[0006] Furthermore, the convex surface is provided with a plurality of rhombus-shaped pointed teeth spaced along its circumference, so as to be in closer contact with the nut and the base body after the torque is applied.

[0007] Furthermore, the stop baffle includes a stop portion that cooperates with the end face of the nut and a connecting portion for connecting the lower gasket and the stop portion, and the stop portion is formed by bending one end of the connecting portion away from the lower gasket toward the direction of the nut. When in use, the connecting portion that has formed a pre-bent structure continues to be bent toward the direction of the nut so that the stop portion fits with the end face of the nut to hold the nut, thereby achieving axial limitation of the nut.

[0008] Furthermore, the through hole is elliptical, and the major axis of the ellipse extends along the width direction of the bending section, which is more conducive to bending.

[0009] Furthermore, the width of the bending section is smaller than the width of the stop baffle, thereby reducing the difficulty of bending.

[0010] Furthermore, the pre-bending angle of the stop baffle is 30°±5°.

[0011] Furthermore, the bending section, the stop baffle and the lower gasket are all rounded transitions, which can reduce stress concentration and improve the connection strength of the three.

[0012] Furthermore, the stop baffle and the lower gasket are integrally formed, thereby further improving the connection strength between the two.

[0013] The beneficial effects of the utility model are as follows: the utility model integrates the double-stack self-locking function and the stopping function in the same double-layer gasket, realizing the physical self-locking function while realizing the physical stopping, and the pre-bending of the stop baffle can reduce the deformation of the bottom of the lower gasket caused by the bending flange on site, and the through hole is reserved in the bending section to reduce the difficulty of bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 It is a side view of the utility model;

[0018] In the figure:

[0019] 1. Upper gasket; 2. Lower gasket; 3. Stop baffle; 301. Stop portion; 302. Connecting portion; 4. Bevel tooth surface; 5. Convex surface; 501. Diamond-shaped clamping teeth; 6. Bending section; 601. Through hole. DETAILED DESCRIPTION

[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0021] Embodiment 1:

[0022] like Figure 1-Figure 3 As shown, the utility model is a double-stacked self-locking stop washer, comprising an upper washer 1, a lower washer 2 and a stop baffle 3 extending outward from the outer peripheral wall of the lower washer 2 to limit the nut axially, the stop baffle 3 and the lower washer 2 are integrally formed and the number of the stop baffles 3 can be but is not limited to one, when the number is multiple, the multiple stop baffles 3 are distributed at intervals along the circumference of the lower washer 2, the washer concentrates the double-stacked self-locking function and the stopping function on the same double-layer washer, realizing the physical self-locking function while realizing the physical stopping.

[0023] The sides of the upper gasket 1 and the lower gasket 2 that are close to each other are both beveled tooth surfaces 4, and the sides that are away from each other are both convex surfaces 5. The two beveled tooth surfaces 4 are meshed with each other, and the two convex surfaces 5 cooperate with the base and the nut respectively. The unevenness of the convex surface 5 is greater than the unevenness of the beveled tooth surface 4, so that the friction between the convex surface 5 and the base or the nut is greater than the friction between the two beveled tooth surfaces 4, so that only relative movement is allowed between the two beveled tooth surfaces 4, and then a certain lifting tension is generated to make the convex surface 5 and the base or the nut fit more closely, and the convex surface 5 is provided with a plurality of rhombus-shaped sharp teeth 501 distributed at intervals along its circumference, which can contact the nut and the base more closely after the torque is applied.

[0024] The stop baffle 3 includes a stop portion 301 that cooperates with the nut and a connection portion 302 for connecting the lower gasket 2 and the stop portion 301. The connection portion 302 is bent toward the upper gasket 1 to form a pre-bend, and the pre-bend angle is 30°±5°. The pre-bend can reduce the phenomenon of deformation of the bottom of the lower gasket 2 caused by bending the stop baffle 3 on site, so as to improve its locking force. The stop portion 301 is formed by bending one end of the connection portion 302 away from the lower gasket toward the nut, and the bending angle is approximately 90°. When in use, the connection portion 302 with a pre-bent structure is further bent toward the nut so that the stop portion 301 fits the end face of the nut to hold the nut, thereby realizing axial limitation of the nut and further preventing the nut from loosening.

[0025] The connection portion between the connecting portion 302 and the lower gasket 2 forms a bending section 6, the width of the bending section 6 is smaller than the width of the stop baffle 3, and the bending section 6 is provided with a through hole 601, and the through hole 601 is elliptical, and the major axis of the ellipse extends along the width direction of the bending section 6, which is more conducive to bending and can reduce the difficulty of bending. The bending section 6 and the stop baffle 3 and the lower gasket 2 are all rounded transitions, which can reduce stress concentration and improve the connection strength of the three.

[0026] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double stack self-locking stop washer, characterized in that: The invention comprises an upper gasket (1), a lower gasket (2) and a stop baffle (3) extending outward from the lower gasket (2) to limit the nut axially, wherein the sides of the upper gasket (1) and the lower gasket (2) close to each other are both beveled tooth surfaces (4), and the sides away from each other are both convex surfaces (5), the two beveled tooth surfaces (4) are meshed with each other, the stop baffle (3) is bent in the direction of the upper gasket (1) to form a pre-bend, and the connection portion between the stop baffle (3) and the lower gasket (2) forms a bent section (6), and the bent section (6) is provided with a through hole (601).

2. A double stack self-locking stop washer according to claim 1, characterized in that: The convex surface (5) is provided with a plurality of rhombus-shaped pointed teeth (501) distributed at intervals along its circumference.

3. A double stack self-locking stop washer according to claim 1, characterized in that: The stop baffle (3) comprises a stop portion (301) matched with the nut and a connecting portion (302) used to connect the lower gasket (2) and the stop portion (301), and the stop portion (301) is formed by bending one end of the connecting portion (302) away from the lower gasket (2) toward the nut.

4. A double stack self-locking stop washer according to claim 1, characterized in that: The through hole (601) is elliptical.

5. A double stacked self-locking stop washer according to claim 1, characterized in that: The width of the bent section (6) is smaller than the width of the stop baffle (3).

6. A double stack self-locking stop washer according to claim 1, characterized in that: The pre-bending angle of the stop baffle (3) is 30°±5°.

7. A double stack self-locking stop washer according to claim 1, characterized in that: The bending section (6) and the stop baffle (3) and the lower gasket (2) are all rounded transitions.

8. A double stack self-locking stop washer according to claim 1, characterized in that: The stop baffle (3) and the lower gasket (2) are integrally formed.

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